package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.sky.constant.MessageConstant;
import com.sky.dto.UserLoginDTO;
import com.sky.entity.User;
import com.sky.exception.LoginFailedException;
import com.sky.mapper.UserMapper;
import com.sky.properties.WeChatProperties;
import com.sky.service.UserService;
import com.sky.utils.HttpClientUtil;
import lombok.extern.slf4j.Slf4j;
import org.apache.http.client.HttpClient;
import org.mybatis.spring.annotation.MapperScan;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.HashMap;
import java.util.Map;

/**
 * TODO
 *
 * @author wxc
 * @date 2023/8/11 19:59
 */
@Service
@Slf4j
public class UserServiceImpl implements UserService {

  // 微信服务接口地址
  public static final String WX_LOGIN = "https://api.weixin.qq.com/sns/jscode2session";

  @Autowired
  private WeChatProperties weChatProperties;

  @Autowired
  private UserMapper userMapper;
  /**
   * 微信登录
   *
   * @param userLoginDTO
   * @return
   */
  @Override
  public User wxLogin(UserLoginDTO userLoginDTO) {
    String openid = getOpenid(userLoginDTO.getCode());
    // 判断openid是否为空，如果为空表示登录失败，抛出业务异常
    if (openid == null){
      throw new LoginFailedException(MessageConstant.LOGIN_FAILED);
    }
    // 判断当前用户是否为新用户
    User user = userMapper.getByOpenid(openid);
    if (user ==null){
      user = User.builder()
              .openid(openid)
              .createTime(LocalDateTime.now())
              .build();
      userMapper.insert(user);
    }

    // 如果是新用户，自动完成注册

    return user;
  }

  private String getOpenid(String code) {
    Map<String, String> map = new HashMap<>();
    map.put("appid",weChatProperties.getAppid());
    map.put("secret",weChatProperties.getSecret());
    map.put("js_code",code);
    map.put("grant_type","authorization_code");
    String json = HttpClientUtil.doGet(WX_LOGIN, map);

    JSONObject jsonObject = JSON.parseObject(json);
    String openid = jsonObject.getString("openid");
    return openid;
  }
}
